Search for a light scalar top in e+ e- reaction at E(cm) = 58-GeV

Shirai, J.; Ohmoto, T.; Abe, K.; Amako, K.; Arai, Y.; Arima, T.; Asano, Y.; Chiba, M.; Chiba, Y.; Daigo, M.

doi:10.1103/PhysRevLett.72.3313

Search for a light scalar top in e+ e- reaction at E(cm) = 58-GeV

VENUS

Collaboration

•

J. Shirai
(
- KEK, Tsukuba
)

Jan, 1994

14 pages

Published in:

Phys.Rev.Lett. 72 (1994) 3313-3316

DOI:

10.1103/PhysRevLett.72.3313

Report number:

KEK-PREPRINT-93-189,
HUPD-9331,
KOBE-HEP-94-02,
KUNS-1243,
OUHEP-94.2,
OULNS-93-08,
TMU-HEP-94-2

Experiments:

KEK-VENUS

View in:

OSTI Information Bridge Server

reference search6 citations

Citations per year

Abstract: (APS)

A search has been made for a light scalar top squark (t̃1), which has remained unexcluded by previous e+e− experiments up to the Z0 pole. By assuming the decay t̃1→c+Z̃1 (lightest neutralino), e+e− annihilation data at Ec.m.=58 GeV have been analyzed. The number of events comprising large-acoplanarity particle groups is consistent with that expected from known processes. We excluded t̃1 in the mass range 7.6–28.0 GeV/c2 and Z̃1 with a mass very close to the kinematical limit at the 95% C.L.

electron positron: colliding beams
colliding beams: electron positron
electron positron: annihilation
annihilation: electron positron
squark: top
postulated particle: squark
search for: squark
decay: squark
squark: decay
quark: charm

References(25)

Figures(0)

Supersymmetry, Supergravity and Particle Physics

Hans Peter Nilles
(
- Geneva U. and
- CERN
)

- Phys.Rept. 110 (1984) 1-162
•
DOI:
- 10.1016/0370-1573(84)90008-5

A STUDY ON SINGLE PHOTON PRODUCTION AT s**(1/2) = 54-GeV TO 61.4-GeV

Venus

Collaboration

•

K. Abe
(
- Tohoku U.
)

et al.

- Phys.Lett.B 232 (1989) 431-436
•
DOI:
- 10.1016/0370-2693(89)90769-7

Measurement of the Differential Cross-sections of $e^+ e^- \to \gamma \gamma$ and $e^+ e^- \to \gamma \gamma \gamma$ at $\sqrt{s}=55$ -{GeV}, 56-{GeV}, 56.5-{GeV} and 57-{GeV} and Search for Unstable Photino Pair Production

VENUS

Collaboration

•

K. Abe
(
- Tohoku U.
)

et al.

- Z.Phys.C 45 (1989) 175
•
DOI:
- 10.1007/BF01674449

Search for {SUSY} Partners of Charged Leptons in $e^+ e^-$ Collisions With $\sqrt{s}$ Up to 60.8-{GeV}

VENUS

Collaboration

•

A. Taketani
(
- Hiroshima U.
)

et al.

- Phys.Lett.B 234 (1990) 202-208
•
DOI:
- 10.1016/0370-2693(90)92029-I

Review of particle properties. Particle Data Group

et al.

- Phys.Rev.D 45 (1992) S1,
- Phys.Rev.D 46 (1992) 5210 (erratum)
•
DOI:
- 10.1103/PhysRevD.45.S1

Search for Supersymmetry in Toponium Decays

John R. Ellis
(
- SLAC
)
,
Serge Rudaz
(
- Minnesota U.
)

- Phys.Lett.B 128 (1983) 248-252
•
DOI:
- 10.1016/0370-2693(83)90402-1

The Search for Supersymmetry: Probing Physics Beyond the Standard Model

Howard E. Haber
(
- UC, Santa Cruz and
- SLAC
)
,
Gordon L. Kane
(
- Michigan U.
)

- Phys.Rept. 117 (1985) 75-263
•
DOI:
- 10.1016/0370-1573(85)90051-1

Light Scalar Top at e+ e- Colliders

Ken-ichi Hikasa
(
- KEK, Tsukuba
)
,
Makoto Kobayashi
(
- KEK, Tsukuba
)

- Phys.Rev.D 36 (1987) 724
•
DOI:
- 10.1103/PhysRevD.36.724

Scalar top production in e+ e- annihilation

Manuel Drees
(
- CERN
)
,
Ken-ichi Hikasa
(
- KEK, Tsukuba
)

- Phys.Lett.B 252 (1990) 127-134
•
DOI:
- 10.1016/0370-2693(90)91094-R

Phenomenology of light top squarks at the Fermilab Tevatron

- Phys.Rev.D 44 (1991) 725-740
•
DOI:
- 10.1103/PhysRevD.44.725

Observation of Charmed Mesons in Photon-photon Collisions

JADE

Collaboration

•

W. Bartel
(
- DESY
)

et al.

- Phys.Lett.B 184 (1987) 288-292
•
DOI:
- 10.1016/0370-2693(87)90584-3

Production of Charmed Mesons in $\gamma \gamma$ Interactions

TASSO

Collaboration

•

W. Braunschweig
(
- Aachen, Tech. Hochsch.
)

et al.

- Z.Phys.C 47 (1990) 499-504
•
DOI:
- 10.1007/BF01552314

Measurement of R and Search for New Quark Flavors Decaying Into Multi - Jet Final States in $e^+ e^-$ Collisions Between 54-{GeV} and 61.4-{GeV} c.m. Energies

VENUS

Collaboration

•

K. Abe
(
- Tohoku U.
)

et al.

- Phys.Lett.B 234 (1990) 382-388
•
DOI:
- 10.1016/0370-2693(90)91946-9

The Lund Monte Carlo for Hadronic Processes: Pythia Version 4.8

- Comput.Phys.Commun. 46 (1987) 43
•
DOI:
- 10.1016/0010-4655(87)90036-1

The Lund Monte Carlo for Jet Fragmentation and e+ e- Physics: Jetset Version 6.2

Torbjorn Sjostrand
(
- Lund U., Dept. Theor. Phys.
)

- Comput.Phys.Commun. 39 (1986) 347-407
•
DOI:
- 10.1016/0010-4655(86)90096-2

Coherent Parton Showers Versus Matrix Elements: Implications of PETRA - PEP Data

- Phys.Lett.B 185 (1987) 435
•
DOI:
- 10.1016/0370-2693(87)91031-8

Generalized vector dominance and inelastic electron - proton scattering

J.J. Sakurai
(
- UCLA
)
,
D. Schildknecht
(
- UCLA
)

- Phys.Lett.B 40 (1972) 121-126
•
DOI:
- 10.1016/0370-2693(72)90300-0

Parametrizations of the Photon Structure and Applications to Supersymmetric Particle Production at HERA

Manuel Drees
(
- Dortmund U.
)
,
K. Grassie
(
- Dortmund U.
)

- Z.Phys.C 28 (1985) 451
•
DOI:
- 10.1007/BF01413608

Parametrization of parton distributions in the photon

- Phys.Lett.B 269 (1991) 458-464
•
DOI:
- 10.1016/0370-2693(91)90201-Z

Photonic parton distributions

- Phys.Rev.D 46 (1992) 1973-1979
•
DOI:
- 10.1103/PhysRevD.46.1973

A search for susy particles in $e^+e^-$ annihilations at $\sqrt{s} = 50$ GeV - 60.8 GeV

AMY

Collaboration

•

Y. Sakai
(
- KEK, Tsukuba
)

et al.

- Phys.Lett.B 234 (1990) 534,
- Phys. Lett. B234 (1990) 534-540 and Tsukuba KEK - KEK-Prepr.-89-134 (89,rec.Dec.) 17 p
•
DOI:
- 10.1016/0370-2693(90)92053-L